Badxaht electric heater



M. H. SHOENBERG AND G. J. HENRY.

RADIANT ELECTRIC HEATER.

LICATION FILED OCT. I6, I919.

, Patented Feb. 8, 1921.

lJ-hll'llElDv STATES- BATE MILTON n. snonnenne AND GEORGE J. HENRY, orsen rnnncrsco, CALIFORNIA.

T QFFICE.

RADIANT ELECTRIC HEATER. 1

Specification of Letters Patent.

Patented Feb. 8, 1921.

Application filed Gctober 16, 1919. Serial No. 331,088.

T 0 all whom it may concern: I

Be it known that we, MILTON l-l. Srronn- BERG and GEORGE J. HENRY,citizens of the United States, and residents of the c1ty and county ofSan Francisco, State of California, have invented new and usefulImprovements'in Radiant Electric Heaters, of which the following is aspecification.

' Our invention has for its object the arrangement of parts so that abeam of radiant heat may be directed in any required angle in a verticalplane, also that the said beam may be laterally oscillated, or rotated.Other objects will'appear from the description which follows. i I

In the heater of the present invention we prefer to arrange a heatingelement which will remain stationary during the lateral movement of thereflector, and substantially about the focus of said reflector, theoscillating or rotary movement taking place by thereflector independentof the heating element, and which reflector movement causes the rotationor oscillation of the radiating heat energy waves as a beam.

By referring to the accompanying figures the invention will be madeclear.

side section of the assembled electrical connections carried downthrough the hollow base and connecting from the source ofelectricalsupply connected by the cord 5 in well known ways. Within the base isthe vertical stem 6, carried on a roller bearing 7 and supported frominternal brackets of the standard 1 as at 8. The stem also should beprovided witha secondary or v guide bearing asshown at 9, and I preferto form this with a grease well as at 10. However, this hearing 9 mayalso be formed to take end pressureif desired, and is then known in theartas a step bearing. Stem 6 may be secured to the reflector, as by therivets, or screws, at l, and laterally braced as by the brace wires 13,let. The means of connection between the stem 6 and the arm 3 ispreferably that of a hinge-joint as shown at 15, so that the reflectormay be tilted 011 the said joint with respect to the stem 6; the saidjoint, however, is located substantially at the center of mass of theheating element 2 and approximately at the focus of 18, so that upon anyswinging of the said reflector to its adjusted positions, it will atalltimes retain the heating element substantially at its focus.

The stem 6 may be oscillated by the mechanism 16, and motor 17; orsuitable connections from the motor 17 to the stem 6 may be provided forthe continued rotation of the said stein, so that the said movement willbe transmitted through the joint 15 turning therewith the reflector 18and consequently oscillating or rotating the beam of the heat projectedtherefrom. I

The reflector 18 is to be cut away as shown at 19, so that it willsuitably clear the standard 1 in its several adjusted positions. Thejoint'15 is to be provided with a swivel screw 23, so that the reflectormay be clampedin its adjusted position, or other well known means may beemployed as a substitute therefor.

We prefer to inclose the motor. mechanism, when this is used, asindicated at 17, within the base of the standard 1, which may besuitably formed for receiving it, or

it may be located externally and suitably connected through said base tothe stem 6,

and electrical connections to the motor not shown but well known, are tobe furnished.

The heating element 2 is tobe mounted on a suitably insulated base 20from the standard 1, and while the annular form, which we have shown inthe figure, is best suited to the heater where complete rotation isadopted, we do not wish to be confined to this form of heating element,as other forms may advantageously be employed, especially whereoscillation of the heat beam is desired, as distinguished from completerotation.

At 20 we have shown the wire guard screen, which is preferably attachedto a ring adapted to engage within the flanged space 21 of theprojecting flange 22, fitted to the periphery of the reflector 18, thusinclosing the heat radiating parts of the heater from accidental contactwith inflamn, The

mable material, or pcrsoi injury. adjusted position of the re tor 18 band at the joint 15 is retained by t' ntening the swivel bol Thesupporting arm 8 is to be provided with suitable braces to retain itrigid with respect to th reflector l8, and its area of connection at twith the heater may be made wider, or additional supports 01' strutsmay, if required, be interposed between and 18.

It will be obvious that the curved surface of the reflector 18 to besuch a concave surface that with heatia element of material size (asdistinguished focal point) there will be emitted was from the curvedsurface of th in the form of a spreading beam. bi'ious that theclearance requisite at "o be such that in any required tilting positionof the reflector 18 it will nevertheless clear the standard or base 1.

lVe claim:

1. In an electrical heater, a heating el.e ment fixed upon a standarc,and substan tially at the focus of a heat reflector, a heat reflectorsupported from a standard and connecting adjustable means whereb" i maybe adjusted with respect to the stancard, a wire guard cage forminginclosin means with the said reflector and inclosin the heating elementand adji; ing means or the said standard, and a stem support thereflector and cage from subs-tan 'ally center of mass of the heating ele2. In an electrical heater, a heat- I i ment fixed upon a standard, andsubstantially at the focus of a heat reflector, a heat reflectorsupported from a standard and connecting adjustable m ans whereby it maybe adjusted with respect to the stan ard, a wire guard cage forminginclosin means with the said reflector and inciosin the heating elementand adjusting means or the said standard, and a stem supporting thereflector and cage from substantially the center of'inass of the heatingelement, and means whereby a rotative movement may be given the stem.

3. In an electrical heater, a heating element fixed upon a standard, andsubstantially at the focus of a heat reflector, a heat reflectorsupported from a standard and connecting adjustable means whereby it maybe adjusted with respect to the stand ard, a wire guard cage forminginclosing means with the said reflector and inclosing the heatingelement and adjusting means of the said standard, and a Eu the reflectorand cage from substa center of mass the heating element, and meanswhereby a rotative movement may be given the stem, and means foradjusting the direction of the reflected heat beam in a vertical planewith respect to the axis of the stem.

y the 4:. In an electrical heater, an electrical resistance heatingelement of symmetrical shape fixed to a standard, a concave reflectormounted with its focus substantially within the heating element; a basesupporting said standard and a rotatable joint between said reflectorand said base with its axis of rotation coincident with the axis of theheating element.

5. Apparatus as set forth in claim & and means for rotating the saidreflector about. the base.

6. Apparanis as set forth in claim at and means for rotating the saidreflector and standard, and a guard flange mounted on the periphery ofsaid reflector of annular form and a plurality of guarc wires from thesaid flange inclosing the heating element.

7. In an electrical heater, an electrical resistance heating elementfixed to a base standard, a concave reflector mounted with its focussubstantially within the heating element; means supporting the reflectorfrom a base and rotatably connected with said base, and means forrotating the said reflector supporting means, and a guard flange mountedon the periphery of said reflector, of annular form, and a plurality ofguard wires from the said flange inclosing the heating element, and anenlarged passage way through said reflector and guard wires admittingrelative adjustment about said base.

8. In an electric heater, a base and a reflecuor for radiant heatrotatably mounted on said base, the axis of said rotation passingsubstantially through the focus of said reflector, an electricalresistance heating element mounted on said base substantially about saidfocus.

9. In an electric heater, base and a re-.

flector for radiant heat rotatably mounted thereon, the axis of saidrotation passing substantially through the focus of said reflector, andelectrical heating element mounted on said base substantially about saidfocus, and a protective grating mounted from the periphery of saidreflector and extending over the heating element on the opposite sidefrom the said reflector.

10. In an electric heater, a standard and a reflector for radiant heatrotatably mounted thereon, the axis of said rotation passingsubstantially through the focus of said reflector, a heating elementmounted on said standard substantially at said focus, and electricalconnections through said standard and energizing said element.

11. In an electric heater, a base and a reflector for radiant heatrotatably mounted thereon, the axis of said rotation passingsubstantially through the focus of said reflector, a heating elementmounted on said base substantially at said focus, and a pro- I tectivegrating mounted on the periphery of said reflector and extending overthe heating element on the opposite side from the reflector, saidreflector and said grating presenting concave surfaces toward saidelement.

12. In a radiant heater, a concave reflector for heat rays rotatablymounted on a standard, a heat emitting element rigidly mounted on saidstandard substantially at the focus of the reflector.

13. In a radiant heater, a concave reflector for heat rays rotatablymounted on a standard, a heat emitting element mounted 15 substantiallyat the focus of the reflector rigidly fixed to said standard, andelectrical connections to said element.

14:. In a radiant heater, a concave reflector for heat rays rotatablymounted on a standard, a heat emitting element mounted substantiallyabout the focus of the refiector and electrical connections to saidelement, in combination with a wire guard frame inclosing with thereflector the element therebetween.

In testimony whereof We have hereunto set our hands at San Francisco,California, this 9th day of October, 1919.

MILTON H. SHOENBERG. GEORGE J. HENRY.

